Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 234
only partially from the penumbra.The umbra is in the form of a cone, with its apex awayfrom the sun; though in the case of the earths shadowit tapers very slowly. The penumbra surrounds the umbra, ASTRONOMY. 21 I and increases in size as we recede from the sun. The axisof the earths shadow lies in… … Fig. 231. ind sometimes below, the ecliptic. It will lie on the eclipticmly when the moon is at one of her nodes. 206. When there will be an Eclipse of the Moon. —The moon is eclipsed whenever it passes into the umbra/ the earths shadow. It will be seen from the figure thathe moon can pass into the…
Astronomy
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